Lock



Patented Dec. A8, c 1931 s UNITED STATES PATENT OFFICE EDWARD N,.IJAcoBI, oF MILWAUKEE, WISCONSIN, AssIGNon 'ro :sarees AND srRA'rToN CORPORATION, OF MILWAUKEE, WISCONSIN, A CORPORATIONVIOF DELAWARE LOG'K Original application iled. April 28, 1921, Serial No. 465,166. Divided and thiswapplication led October 3, 1928, Serial No. 310,093. Renewed November 13, 1930.

j. ment in either direction except by'a key but may be moved in one direction from its position to the key.

lAnother object of this invention 'resides in the provision of an improved lock device wherein the usual lockingtumblers ride on angular surfaceswhile being moved in one direction from unlocked position to locking position to permit the setting of the lock without the use of a key.

It is a further object of Pthis invention to lirst position independently `of the y provide an improved lock structure having a cylinder mounting head and a tumbler car- .rying cylinder rotatable in the head and having disc or flat tumblers arranged to be pressed iush with the cylinder circumference uponV its rotation from one position to a second position but adapted to hold the cylinder against rotation from the last position to the first position except by the retraction of the tumblers by the insertion of a proper key.

And a still further object of this inventionresides in the provision of a lock of the character described in which the cylinder may be readily rotated tov and from either locked or unlocked position by a proper key inserted therein or may be rotated independently of a key from one, position only and being held against rotation from the other position except by use of thekey.

Withthe above and other objects in view which will appear as the description proceeds, my invention resides in the novel con? struction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being'understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claims.

lan the accompanying drawings, l have illustrated one complete example of the physical .embodiment of my invention constructed according to the best mode I have so far devised for the practical application of the principles thereof, and in which:

Figure 1 is a central sectional View of a handle lock as applied to an automobile door handle member and constructed in accordance with this invention;

Figure 2 is an end view thereof;

Figure 3 is a sectional view through the locking bolt; l

Figure 4 is a sectional view through the tumbler cylinder;

Figure 5 is a sectional view through the twirler;

Ffigure 6 is a perspective view of the driver; an

Figure 7 is a detail view showing the driver pin in the lock bolt slot.

Referring now more particularly to the.

accompanying drawings, in which'like numerals designate like parts throughout the several views, 10 designates an escutcheon adapted to be attached to an automobile door or other device in any suitable manner, as by means of screws 12 preferably entering from the inner side of the door. rlhe escutcheon forms a bearing for a door handle member 13 the outer end portion of which provides a lock cylinder mounting head and the inner end of which has a square shank 14 extended therefrom for operating a suitable latch mechanism, not shown.

A locking bolt: l5 passes transversely through the lock cylinder mounting head or member 13 and is. projectable therefrom into engagement with a slot 16 vin the escutcheon to restrain turning of the member4 to be locked. The movements'of the locking bolt are-controlled by alock cylinder 17 rotatably mounted in the mounting head or member 13 and arranged to operate the locking holt through a driver 18 the axis of which intersects that of the locking bolt. The driver and the lock bolt 15 are so related that turning movements of the former produces a reciprocation of the latter, this being accomplished by a pin 19 projecting from the end of the driver 18 slightly eccentric thereto and fitting in a transverse slot 20 in the locking bolt. The slot 20 does not extend entirely across the locking bolt and its inner closed end forms a stop against which the pin 19 strikes to limit the rotary movement of the driver to one-half of a turn.

The operative connection between the driver 18 and the lock cylinder 17 consists of a pair of lugs or projections 21 extending from the end of the driver and fitting within a key slot 22 extended longitudinally through the lock cylinder.

A spring 22 seated in a pocket in the end of the driver 18 between the lugs 21 bears on the end of the lock cylinder and takes up all play between the parts to prevent rattling, the driver 18 being thus held against the locking bolt 15 and the lock cylinder 17 against a retaining ring 23 `which forms a bushing at the end of the handle member through which the lock cylinder projects. A shoulder is formed on the lock cylinder to receive this end thrust by its engagement with the retaining ring.

A proper key 24, when entered through the key slot 22, passes through openings 25 of a series of tumblers 25 fitting in transverse slots 26 of the lock cylinder and its opposite serrated edges Vcause the tumblers to be contained within the lock cylinder for rotation by the key to throw the locking bolt.

When the key is withdrawn, however, which may be in either the locking or unlocking position of the locking bolt, the tumblers are free to drop into the lowermost ofv a pair of diametrically opposite grooves 26 within the handle member, and one of the tumblers, in the present instance the innerto project one end beyond the periphery of the lock cylinder and into one ofthe grooves. When the key is withdrawn with the locking bolt. in the locking position, the tumblers projecting into the grooves 26 eHectively prevent thelock cylinder from being turned and, therefore, prevent the` withdrawal of the locking bolt, and consequently the member being locked cannot be actuated.

When the grooves 26 are formed with parallel sides, as usual, the tumblers projecting therein prevent the lock cylinder from being turned in either direction, irrespective of whether the locking bolt 1s in the locking position or unlocking position. As shown, however, the grooves have cam or angular surfaces 27 on one side thereof, by the action of which the tumblers are forced into the lock cylinder when the latter is turned'in one direction from one position.

The relation of the eccentric pin 19 and the slot of the locking bolt is such that the lock cylinder may only have a half turn, and the cam action for returning the tumblers to the lock cylinder takes place only duringthe movement of the lock cylinder from the position in which the handle or other-member is unlocked to the position in which the member is locked. It will be apparent that on completing the half turn of the lock cylinderin this direction, the tumblers again enter the grooves 26, but as no further' movement in this direction is permitted by the engagement of the eccentric .pin 19 with the end of the locking bolt slot, the cam surfaces 27 cannot be made to again withdraw the tumblers, and the lock cylinder is effectively locked against movement in either direction.

This movement of the lock cylinder under which the cams act to return the tumblers may be effected without the presence of the key by turning the projecting endl of the cylinder by hand, but the member having been locked by this action can only beunflocked by inserting the proper key to withdraw the tumblers and then turning the key to withdraw the locking bolt. For convenience in turning the projecting end of the lock cylinder by hand it may be provided with a serrated iange or twirler 28. y if f When the locking bolt is withdrawn, the handle or other member -may be freely rotated to operate the latch in the usual manner and when it is desired to lock the door or other device, the lock cylinder may be rotated .to locked position'independently ofl the key, as before described. When locked, however, the handle or other member cannot be moved until the locking boltis withdrawn and this requires the use of the key. Y

It is obvious that the lock provided .with hand operated means for rotatin .it to a locking position while requirin a ey to release vit and'ret'urn it to an unloc ing position most one, is yieldably urged by a Jspring 29 is not-necessarily associated with a turning handle in order to have value, but it may possess many of the advantages of the invention when otherw-ise arranged, as when the turn-` ing of the lock cylinder directly actuates a switch or other mechanism.

What l claim as my invention is:

1. 1n a lock, a lock cylinder mounting head having a cylindrical bore, the wall of whichy is provided with diametrically opposed longitudinal slots, a lock cylinder mounted to f turn in the bore of thev mounting head, tumblersv carried by the lock cylinder and normally urged to engage in the slotslof the mounting head when in register therewith to restrain the cylinder against rotation in -the 'l inder in one direction to press the tumblers 'l within the circumference ofthe cylinder. y

2. In a lock, a lock cylinder mounting head having a cylindrical bore the wall of which is provided with diametrically opposed longitudinal slots, a lock cylinder mounted to turn in the bore of the mounting head, tumblers carried by the lock, cylinder and normally urged to engage in the slots of the mounting head when in register therewith to restrain the cylinder against rotation in the i mounting head, said tumblers being retracta, ble within the ,circumference of the cylinder by the insertion of a proper key to free the cylinder for rotation in the mounting head, means operable upon'rotation of the cylinder in one direction to press the tumblers Within the circumference of the cylinder, and means limiting the rotation of the cylinder in the `mounting head.

3. In a lock, a mountinomember having a bore, .a lock cylinder movably mounted in the mounting member bore and having a key slot, abutments carried by the mountingmember and communicating with the bore, locking tumblers carried by the lock cylinder, means at all times yieldably urging at least one of the locking tumblers outwardly of the lock cylinder, said tumblers being engaged with 'one of the abutments when the lock cylinder is inone position to prevent movement thereof and beingl retractable out of engagement with said abutment to free the lock cylinder for movement upon the insertion of a proper key in the key slot, and means independent of the key for pressing the tumblers and into the lock cylinder to free the same for movement from its position engaging the tumblers with another of said abutments.

y 4. In a lock structure of the character described, the combination with a mounting member, ofv a lock cylinder movable in the mounting member between locked and unlocked positions in the performance of its normal locking function, locking tumblers carried by the lock cylinder, means normally yieldably urging at least one of said tumblers outwardly of the lock cylinder, and means carried bythe mounting member and cooperating with said yiel ably urged locking tumbler to positively prevent movement ofv the lock cylinder when in locked position and yieldably restrain movement when in unlocked position.

In testimony whereof I have hereuntoaiixed my signature.

EDWARD N. JACOBI. 

